The goal of this docker image is to create a simple gateway that will intercept email notifications from appliances and devices that can send alerts over email, encrypt the content of the email and send it to my protonmail account, using the free gmail SMTP service. It should be fairly simple for you to clone this repo and replace the google SMTP with another provider.
Changes compared to tianon/exim4 and metabrainz/docker-exim:
- it only forwards email addressed to my protonmail account
- encrypts the body of the email with my protonmail public gpg key
- DOMAIN: optional, use it if you have a custom domain.
- GMAIL_USER: your google id
- GMAIL_PASSWORD: the google application password for your account.
- PROTONMAIL_USER: your protonmail address
- PROTONMAIL_USER_PUBLIC_KEY: path to your protonmail GPG public key
- MYNETWORKS: Add additional networks to authorize relaying mails
You can mount the public gpg key with the -v/--volume command when you run docker. Set the mount location to the variable PROTONMAIL_USER_PUBLIC_KEY, it will get imported on start.
After getting a google application password, you may use something like:
docker run --detach --volume ~/Desktop/[email protected]:/tmp/gpgkey.pub --publish 12025:25 --env [email protected] --env GMAIL_PASSWORD=yourapppasswordhere --env [email protected] --env PROTONMAIL_USER_PUBLIC_KEY=/tmp/gpgkey.pub --env MYNETWORKS='192.168.5.0/24;192.168.5.0/24' --name pmgate blacs30/docker-protonmail-personal-gateway
Images are available at https://hub.docker.com/r/blacs30/docker-protonmail-personal-gateway
See https://protonmail.com/support/knowledge-base/download-public-key/
Exim docker image based on https://github.com/tianon/dockerfiles/tree/master/exim4, plus some improvements added by https://github.com/metabrainz/docker-exim Exim GPG plugin based on https://github.com/Interoberlin/exim-gpg-filter
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